which is to your point, beware of your environment. bottom line here, what do people need to know about the flu? i have heard people saying, i don't know, maybe i'm coming down with the flu. are there very clear signs where you know you should be going to your doctor and then very clear signs when you should be going to the e.r.? >> it's hard to say because people get the common cold in the winter as well. things that are specific to the flu this year, body aches, severe body pain, really bad fatig fatigue, a kougt, often becomes a deep cough, headache and fever. those are things we assign specifically to that spectrum of the flu. runny nose can go along with. it can be vomiting but when i look at this person, i say, this is the flu going on here. >> if you say i'm fine i'm going to ride it out, is there a point you know you really should go to the e.r.? >> if you develop severe shortness of breath or chest pain or notice your lips are turning blue and vomiting a lot and fever above 104, any kind of seizures or anything like that, cert